A MONOGRAPH OF THE TERTIARY POLTZOA OP VICTORIA. 73 



Zoarium encrusting. Zocecia small, subrotimd, distinct, convex, covered with 

 large granulations or nodules ; thyrostome nearly circular, with a small sharp 

 denticle on each side giving the appearance of a wide sinus ; a small, round or 

 elliptical avicularium on a prominent elevation to one side of the thyrostome. 



M.O. ; B.R. Living. Australia. 



This seems to be the form considered by Waters as a variety of Smitt's 

 L. cleidostoma, and, if so, is probably identical also with that described by Hincks 

 as the same species, var. orbicularis (A.M.N.H., Aug., 1881), dredged abundantly 

 by Captain Cawn "Warren in Bass's Straits. So far, however, as I can judge from 

 Smitt's description and figures, they appear to me to be totally distinct species. 



7. L. prceclara, n.sp. PL X., fig. 14. 



Zocecia wider in the middle so as to be nearly hexagonal, separated by narrow 

 raised margins immediately within which is a row of small round pores ; surface 

 smooth and hyaline ; thyrostome large, expanded and rounded above, the lower lip 

 slightly hollowed, and having a small sharp denticle at each angle ; an avicularium 

 on a slight elevation below the thyrostome, situated mesially or to one side. Ocecia 

 large, prominent, flattened in front, the circumference smooth, the central part with 

 numerous small concentrically arranged pores. 



B.R. 



8. L. perforata, n.sp. PL X., fig. 15. 



Zoarium unilarainate, probably crustaceous. Zocecia broad, separated by narrow 

 raised margins ; surface smooth, with numerous round pores, mostly in two rows 

 round the sides, leaving the central part entire ; thyrostome large, arched above, the 

 lower edge straight, and with a minute denticle at each angle ; a slight swelling of 

 the zocecium immediately below the thyrostome, supporting a small avicularium. 



S.P. 



9. L. elongata, n.sp. PL X., figs. 12, 13. 



Lepralia foliacea, Waters, Q. J.G.S., 1882, p. 269 and 508. 



Zoarium bil animate. Zocecia in linear series, much elongated, with narrow 

 raised margins, immediately within which is a row of small round pores ; surface 

 smooth; thyrostome large, rounded above, lower lip nearly straight or slightly 

 hollowed, a sharp denticle on each side; a small avicularium immediately below the 

 thyrostome, either in the middle line or a little low r er, and to one side. 



M.C. ; B. ; M. 



